Eraser cleaner



section Patented Arm-. 24, 1928.

FREDERICK IBQMEYERS AND HARRY W. mnmwormmmom humm r As sxcavons orQNEQHALF TO manure Baaeomm; orflnammonn; AR LAND.

d NEBASER (momma; xii

or other soft rubbing face of the, eraser abe-v iing thereby caused tofly out intoithe; open air so that it. is exceedingly apt to be breathedby theperson cleaning the eraser and :by other pupils, Orl -personsinthe room. This method is obviously unsanitary and .un} healthful, andit is the object of the present invention to providea sinipleand'inexpens i re device whereby blackboard ierasers, may be veryeffectually and rapidly oleaned and the dust confined s o thatit will.not blow a bout-and cannot contaminate the .air ithin the school room.The .objectofthe invention is attained in such a device as .isillustrated in the .acco1npanying drawing, andthe invcntionresi'desln-certain novel features wh ch p g rated .thereh'on'ig Belowthe scraper a will be hereinafterfirst fully described-and then moreparticularly defined theap- I r box to restupon the bottom ofthe sameand one end of this tray or draweris provided with a head .l8yfitting.closely Within an "opening provided therefor in the end ofthe pendedclaims.

In the drawing; o. U Figure 1 a central vertical longitudinal of aneraser cleaner embodying our invention-y v I f Flg. 2 is a transversesection on thenh ne of Fig. 1. and i Fig. 3 is a detail plan view .ofthegrating or scraper by the .action of which the dust is loosened tronitheeraser. I p

In carrying out the invention, there is provided a container comprising"a box 'or body 1 of oblong form which is adapted to be firmly securedupon a .supporgthe (llflWlng'SliQWlllg the box as provided with a base 2having its edge. -pO1t10l1S. P1fO]GOt111g' beyond the sides and ends ofthe box and formed with openings 3 therethrough rqr the I v Itheacontamer :below a plunger 18 so'that- 1 insertion of screwsrorotherfastening devices intoany convenient fixed support. The containeralso includes a cover 4 which is .con-

.nected by hinges -h at one side to the top. of

the boxand at the other "sideisheld closely thereto "by a claspfi of anyapproved type, the cover being thereby held firmly to the box so thatthedust from the eraser-ivilhbe held within the box and cannot escapeinto the open air. ln the sides of thebox above the bottom thereof .areprovided cleats or rails T which torin horizontal"guldes ior'a scraper 8consisting'of anopen tralnefitting rather oloselyrbetween the sides ofthe box and :provided in its sides with longitudinal eci roca e. Theplunger comprises plate 1-8Iandastemorrod19 firmly secured @1927. serialso. 205,239.-

grooves I I ing. edges of the cleats 7, as clearly shown thefrarne8*islsecured a rod'lO extending '1 therefro1n through an openingQtherefor in the end of the box and provided beyond the ,box With anyconvenient of handle 11.;

b b D orm Obviously by grasping the handle 11 ,thescraper. frame ;8 maybe reciprocated alongithe cleats 'Zso that the upper edges of. the slats9 may rub across the sur face of an eraser presented thereto and therebyv so agitate: the surface that it will be spreadsomewhat andthe chalkdustsepa drawer or tray 12 is fitted .closely vvithin the box oppositethe handle 11 so that the openng .in :the box, will be closed but thedrawer ,or tray maybe easilyv Withdrawnwhen it is desired to remove thedust collectedtherein.

The head provided with aicap plate 14 bearing 'aga nst the outer side ofthe box laroundgthe opening and this cap plate is equipped with a handle15 of any convenient A latclrlti may be ,provided to hold the draweragainst accidental Withdrawal and a lso tov hold theeap plate .14 :overthe .0pening inthe end o'f the box so as to resist leakage of the dust.

theeraser to the scraperv While the latter is thereto and risingtherefrom through the $01) of the cover, anexpansion spring 2Q be-Iingco'iled around; the plunger rod or stem 19 between the cover andaknob or. handle 21 [at the upperend of the plungerv rod, as

; The eraser 17. mounted in the cover, of,

aggregate with at roject? 1n 2. Fittedin the open frame are p pluralityof transverse slats or blades 9, the upper-edges ofwhioh projectslightly above 130 a pressure exerted upon the plungerwill holdshmvnywhereby the plunger will be 11015 mally held in its raisedpositionand willrelease the eraser when the pressurethereon lhasq'been'.Withdrawal To hold theeraser against movement transversely or; longitudhnally of the cover, the side members of the cover are of such dimensionsor so spaced that they will accommodate the eraser between them butwill: prevent any excessive movement; laterally of the .craser whichwould permit it to shift to one side of the scraper. Extending betweenthe side mem bers of the cover is a bar or stationary clamping member 22against which one end of the eraser may abut, as shown in Fig. l, and inthe lower edge of thisclamping member is a notch 23 to facilitate theinsertion or removal of the eraser. The opposite end of the eraser isengaged by a movable clamping jaw 24L fixed upon the end of a rod 25which extends therefrom toward the adjacent end of the cover and isslidably mounted in the inner end wall of a chamber'or case 26, theouter end of said rod being equipped with a piston 27 within saidchamber and an expansion spring 28 being housed within the chamberbetween the piston and the outer end wall of the cover, as clearly shownin Fig. 1, so that the force of the spring is exerted Constantly toproject the abument or clamping jaw 22lagainst the eraser and therebyhold the eraser against the stationary clamping member 22.

The use of the device will, it is thought, be clear from the foregoingdescriptiointaken in connection with the accompanying drawing. When aneraser is 'to be cleaned, the lid or cover of the box is swung over toopen position and the eraser is then inserted between the clampingmembers 22 and 24: by pressing one end of the eraser against the movableclamping jaw 24 and then pushing the eraser between the two clampingelements. The spring 28 will then hold the eraser firmly between theclamping elements as previously described. The cover is then returned toclosed position and pressure is exerted downwardly upon the plunger rod19 so that the eraser will be pressed against the scraper, and thescraper is reciproc ated by manipulation of the handle 11 and rod 10 inan obvious manner. The upper projecting edges of the several scraperslats 9 will have a beating action upon the surface of the eraser sothat the dust collected therein will be loosened and will fall throughthe spaces between the slats into the drawer or tray 12. The operationof the device for a very short period of time will thoroughly clean theeraser and after one eraser has been cleaned it is removed and anothereraser inserted, the operation being repeated until all of the eraserson hand have been cleaned. Vvhile ordinarily the device will be made toaccommodatea single eraser, it will be obvious that it may be made insuch dimensions as'to accommodate two or more crasers at one time and,of course, may be made in various dimensions according to the sizes ofthe erasers which are in use.

The device is very compact and is free of complicated arrangements orconstructions so that it may be easily manipulated and will not be aptto get out of order. p p I -Having thus described the invention, weclaim 1. An apparatus for the purpose set forth con'iprising a containerconstructed to admit an eraser, means for mounting an eraser within thecontainer, a reciprocablc scraper titted within the container to actupon an eraser mounted therein, means for closing the container aroundthe eraser, and means for pressing the eraser against the scraper.

2. An apparatus for the purpose setforth comprising a container, meansfor releasably supporting an eraser therein, a scraper mounted 'slidablywithin the container in position to act upon the eraser andhaving discharge openings through its bottom whereby dust from the eraser may passfreely therethrough, means whereby an eraser may be a u held against thescraper, means for closing the container around the eraser and thescrap-er, and a dust collector removably fit ted'in the container belowthe'scraper.

3. An apparatus for the purpose set forth comprising a container, meansfor mounting an eraser within the container, a reciprocatory scrapermounted within the container below the eraser and comprising an openframe and transverse slats secured in said frame in spaced relation withtheir upper edges projecting aboveythe frame to impinge upon the eraser,means for closing the container around the eraser and the scraper, andmeans whereby the eraser may beheld o the scraper.

4. An apparatus for the purpose set forth comprising a container, ascraper slidably 'mounted in'the container, a handle element secured toone end of the scraper and projecting through the adjacent end of thecontainer, yielding means for supporting an eraser over the scraper,means for closing the container around the scraper and the eraser, andmeans whereby an eraser may be held to the scraper.

5. apparatus for the purpose set forth comprising a container, areciprocatory scraper mounted therein, a fixed clamping element withinthe container above the scraper against which an eraser may abut, amovable clamping jaw cooperating with said fixed clamping member to holdan eraser, means for yieldably projecting the movable clamping jawtoward the fixed clamping element, means for closing the containeraround the eraser and the scraper, and means between the clampingjaw andfixed clamping element to hold an eraser against the scraper.

6. An apparatus for the purpose set forth comprising a container, areciprocatory scraper mounted in the container, means above the scraperfor supporting an eraser,

plunger rod secured to the plunger and ex tending therefrom through thetop of the container whereby pressure may be applied to hold the eraSe-rto the scraper, and yieldablemeans acting on the plunger rod to normallyretract the same.

7. An apparatus for the purpoee setglorth eoneprieing a container, areeiproeatory scraper mounted within the container, :1 fixed clampingjaw in the container above the tures.

scraper, a movable clamping jaw cooperatmg with the fixed 'elampmg awwhereby to secure an eraser inserted, between the jaws,

a rod extending outwardly from the movable clamping jawpa pistonon saidrod, yieldable means acting on the piston to project the movable clan'ping jaw toward the fixed elan'naing jaw, and means for closing thecontainer around the eraser and the scraper.

In testimony whereof FRED. B, MnYnns. L s.]

HARRY \V. DARNEY. [1,. s.]

